Dredge-tumbler



C. B. ANDREWS.

DREDGE TUMBLER.

APPLICATION FILED MAR. 6, 1919.

1,833,367. Patented Mar. 9,1920.

lame/Lion.

C .B. Amw'euas CHARLES B. ANDREXVS, 0F

CORPORATION OF NE'W J HIS-2E BRIDGE N WHARTON IBQN AND STEEL CGMPA EV]JERSEY, .dSSIGE TOB TO TAYLOR- OF HIGH BRIDGE, NEW JERSEY, A

DREDGE-TUMBLER.

Specification of Letters Patent.

lPatented Mar. a, mac.

Application filed March 6, 1819. Serial No. 280,926.

To all "to/tom it may concern:

Be it known that 1, CHARLES B. itrrionnws, citizen of the United States,residing at High Bridge, in the county of Hunterdon and State of NewJersey, have invented certain new and useful Improvements inDredge-Tumblers, of which the following is a specification.

Dredge tumblers, for some years past, have been constructed lar ely ofmanganese steel, because of its enormous strength and wear-resistingproperties, qualifications very desirable in dredge-work.

Contemplating the use of this material, but not necessarily restrictedthereto, and having in mind the diiiiculty and exacting requirements ofits casting and subsequent heat-treatment, one of the principal objectsf this invention is to provide a tumbler possessed of great strength andconstructed on the unit plan in orde to minimize loss in the foundry andin order to facilitate the renewal or replacement of worn or damagedparts. Another principal object is to provide a three-piece tumbler,comprising a flanged or spool member and a pair of opposed drum or hubmembers introduced endwise of the spool member, the spool and drummembers being interfitted and held against relative movement in a novelmanner as will be enlarged upon hereinafter. Another principal object isto provide, in a tumbler of the character stated,'a partible drum orcarrier formed of mated sections having a metallic bond or interlock.Another principal object is to provide a tumbler spool having a'reversely tapered bore and mated spool carrying elements having a wedgefit therewith.

l/Vith the foregoing and other objects in view, the nature,characteristic features and scope of the invention will more readily beunderstood from the following descrip tion taken in connection with theaccompanying drawing, forming a part hereof, wherein Figure 1 is a Viewprincipally in longitudinal section of a tumbler embodying features ofmy invention.

Fig. 2 is a longitudinal sectional view of the drum sections and theirconnecting links in detached relation.

Fig. 3 is a framentary transverse sectional view of the tumbler.

Fig. 4 is a fragmentary longitudinal sectional view of a modification.

Referring to the drawing, the nume 'al 5 designates the spool, which, asto its outer peripheral wall and flanges, may be as usual. Its innerperipheral wall is formed on 0pposed tapering lines, indicated at 6, 6,in order to establish a ground joint between it and the tapered walls ofthe carrier. Otherwise stated, the spool has a reversely tapered boreand the spool-carrying elements, hub or drum sections, are designed tobe wedged therein.

The spool carrier is formed of two opposed coincident or mated drumsections 7, 7, which, as indicated in Fig. 1, are confronted byintroducing them endwise of the spool. Each drum section 7 is a singlecasting with a tapered external peripheral wall 8, inner peripheral wallor hub 9, solid end wall 10, and integral webs or strengthening ribs 11.The webs 11 have oii'set provisions, lugs or keys 12, and when thesections are pressed together and the parts are juxtaposed, the webextensions 12 are bridged and metallically bonded by carbon steel links13, or their equivalents, by, for example, shrinking said links to placein a manner well understood.

wedge it and round joint between the spool and mated spool-carryingsections is ordinarily sufficient to prevent relative rotative movement,but as a further factor of safety I provide the inner wall of the spoolwith a lug 14 and the drum sections with corresponding slots or recesses15.

The mated drum or hub sections 7 may have the usual soft metal linedkeyways 16, 17.

For comparatively small size tumblers the bore of which is too small toconveniently admit of introoucing the links 13, I may employ in lieu ofthe links the through bolts 18, Fig. or their equivalent, the tumblerfaces having countersunk provisions 19, 20, to accommodate the boltheads and nuts.

Evidently, I have provided a tumbler of simple yet rugged construction,theelements whereof are readily separable for major or minor repairs.The provision of the mated drum sections minimizes faulty castings andworrs an economy in maintenance and repairs in that damage to one membercan be rectified without disturbing the relation between the othersection and the spool, and in the event of danmge to the spoolnecessitating its replacement, it is a very simple matter to dissolvethe bond between the mated sections or to disconnect the sulbstitutefastenings and to unwedge said sections with respect to the spool.

iVhile the spool and drum elements will generally be made of manganesesteel, I may depart therefrom it the occasion warrants.

For example, I may construct the spool or flange member of manganesesteel and the drum elements of carbon steel.

1 claim l. A dredge tumbler, comprising a spool, a. sectional *arrierformed of mated drum sections with confronting radial offset portions,and means uniting said ofi'set portions.

9. A dredge tumbler, comprising a spool, a sectional carrier formed ofmated drum sections with confronting webs having radially disposed lugsor offsets, and interlocking means for the lugs.

3. ii dredgetinnbler, comprising a spool and mated drum sections onwhich it is fixedly mounted, said drum sections having solid end walls,hub members and confronting radial otiset portions, and a metallic bondconnecting said ofiset portions.

4. A dredge tumbler, comprising a spool, a sectional carrier formed ofmated drum sections with webs, and coupling members bridging and shrunkupon the webs.

5. A dredge tumbler, comprising a spool, a sectional carrier formed ofmated drum sections whereof each has a ground fit'with the spool, andlinks bridging and shrunk upon the drum sections.

6. A dredge tumbler, comprising a spool consisting of a single castinghaving a reversely tapered bore, a sectional carrier formed of mateddrum sections whereof each has a ground lit with the spool, and linksbridging and shrunk upon the drum sections. V

7. A dredge tumbler, comprising mated drum sections having tapered rimsand hub members connected by solid end walls and webs, a spool memberconsisting of a manganese steel casting having a reversely tapered borewhich efieets av ground or wedge fit with said tapered rims, couplingmeans for the drum sections, and supplemental means to prevent relativerotation of the parts. r V

In testimony whereof I afiix my signature.

CHARLES E. ANDRENS.

